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Codeforces Round 946 (Div. 3)
30:51:44
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Difficulty:
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brute force
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Problems
#
Name
1213D1
Equalizing by Division (easy version)
brute force
,
implementation
1500
x11037
1858B
The Walkway
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x10679
1651C
Fault-tolerant Network
brute force
,
data structures
,
implementation
1500
x10484
1744E1
Divisible Numbers (easy version)
brute force
,
math
,
number theory
1500
x10269
1313C1
Skyscrapers (easy version)
brute force
,
data structures
,
dp
,
greedy
1500
x10113
1208B
Uniqueness
binary search
,
brute force
,
implementation
,
two pointers
1500
x10082
1759E
The Humanoid
brute force
,
dp
,
sortings
1500
x10035
877B
Nikita and string
brute force
,
dp
1500
x9993
1742G
Orray
bitmasks
,
brute force
,
greedy
,
math
,
sortings
1500
x9922
1659C
Line Empire
binary search
,
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x9733
891A
Pride
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x9639
1287B
Hyperset
brute force
,
data structures
,
implementation
1500
x9184
1051C
Vasya and Multisets
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x9147
742B
Arpa’s obvious problem and Mehrdad’s terrible solution
brute force
,
math
,
number theory
1500
x9045
1269B
Modulo Equality
brute force
,
sortings
1500
x8901
409H
A + B Strikes Back
*special problem
,
brute force
,
constructive algorithms
,
dsu
,
implementation
1500
x8692
978D
Almost Arithmetic Progression
brute force
,
implementation
,
math
1500
x8403
855B
Marvolo Gaunt's Ring
brute force
,
data structures
,
dp
1500
x8374
1732D1
Balance (Easy version)
brute force
,
data structures
,
implementation
,
number theory
1500
x8297
997A
Convert to Ones
brute force
,
greedy
,
implementation
,
math
1500
x8166
863B
Kayaking
brute force
,
greedy
,
sortings
1500
x7612
574B
Bear and Three Musketeers
brute force
,
dfs and similar
,
graphs
,
hashing
1500
x7611
496C
Removing Columns
brute force
,
constructive algorithms
,
implementation
1500
x7595
614A
Link/Cut Tree
brute force
,
implementation
1500
x7399
908C
New Year and Curling
brute force
,
geometry
,
implementation
,
math
1500
x6670
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x6276
1012A
Photo of The Sky
brute force
,
implementation
,
math
,
sortings
1500
x6153
300B
Coach
brute force
,
dfs and similar
,
graphs
1500
x6117
696A
Lorenzo Von Matterhorn
brute force
,
data structures
,
implementation
,
trees
1500
x5989
761C
Dasha and Password
brute force
,
dp
,
implementation
1500
x5838
496B
Secret Combination
brute force
,
constructive algorithms
,
implementation
1500
x5810
18A
Triangle
brute force
,
geometry
1500
x5706
402C
Searching for Graph
brute force
,
constructive algorithms
,
graphs
1500
x5703
354A
Vasya and Robot
brute force
,
greedy
,
math
1500
x5397
255C
Almost Arithmetical Progression
brute force
,
dp
1500
x4627
868C
Qualification Rounds
bitmasks
,
brute force
,
constructive algorithms
,
dp
1500
x4529
159D
Palindrome pairs
*special problem
,
brute force
,
dp
,
strings
1500
x4253
846A
Curriculum Vitae
brute force
,
implementation
1500
x4165
22B
Bargaining Table
brute force
,
dp
1500
x4082
443B
Kolya and Tandem Repeat
brute force
,
implementation
,
strings
1500
x3985
342B
Xenia and Spies
brute force
,
greedy
,
implementation
1500
x3985
724B
Batch Sort
brute force
,
greedy
,
implementation
,
math
1500
x3978
837C
Two Seals
brute force
,
implementation
1500
x3934
425A
Sereja and Swaps
brute force
,
sortings
1500
x3814
858B
Which floor?
brute force
,
implementation
1500
x3698
358B
Dima and Text Messages
brute force
,
strings
1500
x3683
1575J
Jeopardy of Dropped Balls
binary search
,
brute force
,
dsu
,
implementation
1500
x3651
1070H
BerOS File Suggestion
brute force
,
implementation
1500
x3614
114B
PFAST Inc.
bitmasks
,
brute force
,
graphs
1500
x3539
229A
Shifts
brute force
,
two pointers
1500
x3440
278B
New Problem
brute force
,
strings
1500
x3419
887C
Solution for Cube
brute force
,
implementation
1500
x2834
177C2
Party
brute force
,
dfs and similar
,
dsu
,
graphs
1500
x2445
254B
Jury Size
brute force
,
implementation
1500
x2134
1949B
Charming Meals
binary search
,
brute force
,
greedy
,
sortings
1500
x1936
316E1
Summer Homework
brute force
,
data structures
1500
x1447
316B1
EKG
brute force
,
dfs and similar
1500
x1361
239B
Easy Tape Programming
brute force
,
implementation
1500
x1358
371C
Hamburgers
binary search
,
brute force
1600
x23733
1334C
Circle of Monsters
brute force
,
constructive algorithms
,
greedy
,
math
1600
x16111
1389B
Array Walk
brute force
,
dp
,
greedy
1600
x15847
1519D
Maximum Sum of Products
brute force
,
dp
,
implementation
,
math
,
two pointers
1600
x14617
1305C
Kuroni and Impossible Calculation
brute force
,
combinatorics
,
math
,
number theory
1600
x13643
1395C
Boboniu and Bit Operations
bitmasks
,
brute force
,
dp
,
greedy
1600
x13537
1364C
Ehab and Prefix MEXs
brute force
,
constructive algorithms
,
greedy
1600
x12688
1622C
Set or Decrease
binary search
,
brute force
,
greedy
,
sortings
1600
x12415
1537E1
Erase and Extend (Easy Version)
binary search
,
brute force
,
dp
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
1600
x12298
1632C
Strange Test
binary search
,
bitmasks
,
brute force
,
dp
,
math
1600
x12273
1920C
Partitioning the Array
brute force
,
math
,
number theory
1600
x11899
165C
Another Problem on Strings
binary search
,
brute force
,
dp
,
math
,
strings
,
two pointers
1600
x11890
1555D
Say No to Palindromes
brute force
,
constructive algorithms
,
dp
,
strings
1600
x11778
1593E
Gardener and Tree
brute force
,
data structures
,
dfs and similar
,
greedy
,
implementation
,
trees
1600
x11730
1481C
Fence Painting
brute force
,
constructive algorithms
,
greedy
1600
x11312
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x11128
1511D
Min Cost String
brute force
,
constructive algorithms
,
graphs
,
greedy
,
strings
1600
x11074
1213D2
Equalizing by Division (hard version)
brute force
,
math
,
sortings
1600
x11060
1843E
Tracking Segments
binary search
,
brute force
,
data structures
,
two pointers
1600
x11031
1151B
Dima and a Bad XOR
bitmasks
,
brute force
,
constructive algorithms
,
dp
1600
x10701
1748C
Zero-Sum Prefixes
brute force
,
data structures
,
dp
,
greedy
,
implementation
1600
x10501
559A
Gerald's Hexagon
brute force
,
geometry
,
math
1600
x10290
1722E
Counting Rectangles
brute force
,
data structures
,
dp
,
implementation
1600
x10111
1703G
Good Key, Bad Key
bitmasks
,
brute force
,
dp
,
greedy
,
math
1600
x10059
1512E
Permutation by Sum
brute force
,
greedy
,
math
1600
x10039
1687A
The Enchanted Forest
brute force
,
greedy
1600
x10007
1849C
Binary String Copying
binary search
,
brute force
,
data structures
,
hashing
,
strings
1600
x9883
1321C
Remove Adjacent
brute force
,
constructive algorithms
,
greedy
,
strings
1600
x9515
1917C
Watering an Array
brute force
,
greedy
,
implementation
,
math
1600
x9442
1198B
Welfare State
binary search
,
brute force
,
data structures
,
sortings
1600
x9323
1140C
Playlist
brute force
,
data structures
,
sortings
1600
x9274
246D
Colorful Graph
brute force
,
dfs and similar
,
graphs
1600
x9214
1498C
Planar Reflections
brute force
,
data structures
,
dp
1600
x9205
1482C
Basic Diplomacy
brute force
,
constructive algorithms
,
greedy
,
implementation
1600
x9101
1921E
Eat the Chip
brute force
,
games
,
greedy
,
math
1600
x8952
704A
Thor
brute force
,
data structures
,
implementation
1600
x8944
1461D
Divide and Summarize
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
,
sortings
1600
x8915
1907E
Good Triples
brute force
,
combinatorics
,
number theory
1600
x8870
1714D
Color with Occurrences
brute force
,
data structures
,
dp
,
greedy
,
strings
1600
x8737
1225C
p-binary
bitmasks
,
brute force
,
math
1600
x8655
1523C
Compression and Expansion
brute force
,
data structures
,
greedy
,
implementation
,
trees
1600
x8598
1290A
Mind Control
brute force
,
data structures
,
implementation
1600
x8317
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